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A066389 Number of 2-generated groups of order n: groups that have a generating set of size <=2, i.e. are cyclic or of the form <a,b>. 2
1, 1, 1, 2, 1, 2, 1, 4, 2, 2, 1, 5, 1, 2, 1, 9, 1, 4, 1, 5, 2, 2, 1, 13, 2, 2, 4, 4, 1, 4, 1, 20, 1, 2, 1, 12, 1, 2, 2, 12, 1, 6, 1, 4, 2, 2, 1, 35, 2, 4 (list; graph; refs; listen; history; internal format)
OFFSET

1,4

CROSSREFS

Cf. A000001.

Sequence in context: A080825 A034693 A072342 * A077191 A050363 A166974

Adjacent sequences:  A066386 A066387 A066388 * A066390 A066391 A066392

KEYWORD

nonn,nice

AUTHOR

Sharon Sela (sharonsela(AT)hotmail.com), Dec 23 2001

EXTENSIONS

More terms from Reiner Martin (reinermartin(AT)hotmail.com), Dec 29 2001

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Last modified February 15 11:25 EST 2012. Contains 205777 sequences.